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01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

06-07-2025 19:36

Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España) recolec

05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12

Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

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Pyreno on Fraxinus excelsior.
Per Marstad, 16-03-2019 18:39
Per MarstadI found this to-day, in Norway.
On the bark of Fraxinus, small, ca 1 mm.
Konidia 25 - 28 x 12 my.
It is nice with a name.
Per.
  • message #56852
  • message #56852
Chris Yeates, 16-03-2019 18:50
Chris Yeates
Re : Pyreno on Fraxinus excelsior.
Viktorie Halasu, 16-03-2019 21:20
Viktorie Halasu
Re : Pyreno on Fraxinus excelsior.
Dear Chris,

I'd like to ask, what's the difference between Macrophoma fraxini and Diplodia fraxini (or rather D. mutila, without brown conidia)? 
Thank you in advance.

Viktorie

https://www.researchgate.net/publication/260591572_The_complex_of_Diplodia_species_associated_with_Fraxinus_and_some_other_woody_hosts_in_Italy_and_Portugal
Chris Yeates, 16-03-2019 21:29
Chris Yeates
Re : Pyreno on Fraxinus excelsior.
They may represent the same thing as far as I know. "Coelomycetes" can be a taxonomic minefield, crying out for more molecular work.
Viktorie Halasu, 16-03-2019 21:39
Viktorie Halasu
Re : Pyreno on Fraxinus excelsior.
Yes, there's also a paper "Relationship of Macrophoma and Diplodia" (1904) by J.T.Emerson who obtained both types of conidia from a single pycnidium. That's why I was asking, to see if there's a molecular work on them. 

By the way, my collections identified as Diplodia (fraxini or mutila, I'm still not sure how to distinguish them without dark brown conidia abundantly present) released a pigment into water or KOH mount, hyaline in visible light, but bluegreen in UV 365 nm. (The dark blue background is an artifact, I probably forgot to use UV filter.)

Correction: the UV+ water-soluble pigment it's actually not from the fungus, but from upper layer of Fraxinus bark. :-/ Sorry for not checking that before.
  • message #56865